I just turned 24&my hair in the front and now hair line which i always part in the center-is thinning!im fine in the back but frontal is majorly thin ?

Alopecia: Could be the androgenic type if you have frontal thinning, however in a female it may indicate the possibility of some sort of medical disease such as a hormonal problem/Polycystic ovarian syndrome. Advise assessment with a doctor licensed in your area to assess you as you may need some tests run to exclude these possibilities. All the best.

Thin hair: If you're concerned about hair loss which could be congenital,familial or caused by medical problems like thyroid or other hormonal abnormalities or even skin conditions, consult a dermatologist who will evaluate the type of hair thinning you have. He/she will be able to order appropriate tests and also advise you whether the thinning is permanent or not. A skilled beautician also teaches hair car